Corrugated cardboard for packing purposes.



C. THIEBAUT.

GORBUGATED CARDBOARD FOR PACKING PURPOSES.

APPLIGATION IILED APR. 1, 1903.

1,065,639, Patented June 24,- 1913.

UNITED STATES PATENT OFFICE.

calms manner, or rams, manor, ASSIGNOB, TO xavnsa PENE, or ozone PARK, NEW YORK.

CORRUGATED CARDBOARD FOR PACKING PURPOSES.

Specification of Letters Patent.

Application filed April 1, 1908. Serial No. 150,660.

Be it known that 'I, CAMILLn TriIIiBAUT, a citizen of the French Republic, residingat '268 Avenue Daumesnil, Paris, France, have invented certain new and useful Improve meats in Corrugated, Cardboard for Packing Purposes, of which the following is a specification. V

This invention relates to improvements in corrugated cardboard.

'Plai'ted, waved or corrugated cardboards as hitherto manufactured do not present suflicient rigidity for large packages. It is 'true that in some cases there has been stuck to one or both sides ofsheets' of corrugated cardboard a smooth sheet uniting all the corrugations situated upon the same side, but the product so obtained is expensive, inextensible and only imperfectly resists compression exerted at right angles to the original' plane surface of the sheet ns-conditions which should be fulfilled by corn gated cardboard are as follows: 1. The cost price should be exceedingly small, 2. The weight should be as small as posible. 3. The cardboard should present the greatest possible resistance to the efforts of com ression which it may have to support cit er in the direction of the original plane surface before corrugation, or at right angles to this plane. 4. Constant extensi bilit-y for the purpose of permitting the cardboard to be shaped as regularly as possible to the objects to be packed and of causing it to assume the form of packages of the mostvarious kinds, such as flagons or hottles. In my novel corrugated cardboard all these conditions are fulfilled.

-In theaccompanying drawing: Figure 1 is a section on the line AB of Fig. 2.

Fig: 2 is a plan view of my novel corrugated cardboard. Fig. 3 is an elevation of 'the fluted shaft for driving the endless chains in a machine for making this cardboard. Fig. i is a plan view showing the relative positions of the fluted shaft and the endless chain of saidmachine, and Fig. 5 is a sectional view of said machine showing two endless chains pressing a sheet of cardboard p In chain machines employed in the production of corrugated cardboard, the driving. is effected by means of gear wheels cast upon a shaft. When the paper or other substance to be treated is of small thickness, the folds or undulations are produced without difficulty, but when the substance to be treated is of any considerable thickness, the blades of the chains which are only supported at a few points in their length cannot sufficiently support the effort which they must overcome, this effort consisting in forcing the cardboard to assume the profile of the blades of the chains without rupture.

Inthis machine the drivin shafts a are provided with grooves throng out their entire length, in such a manner as to produce the driving of these chains b equally throughout their width and a corrugated cardboard is produced which presents all the characteristics herein enumerated. This novel cardboard is provided in the usual manner with corrugations which are formed alternately above and below the ing smooth and continuous throughout their length these corrugations are formed with protuberances, ribs or projections f at greater or less intervals one from the other, which so to speak convert each of the folds, undulations or corrugations into a. reinforced beam, and the sheet of cardboard as a whple into a series of rigidly connected reinforced beams. It will be readily understood that these protuberances impart to the corruga. tions considerable capacity for resisting pressure which may be exerted in adirection at right angles to the original plane of the sheet of cardboard and that they render unnecessary the employment of the auxiliary sheet of cardboard stuck to the summits of each of the corrugations which has been referred to above. The absence of this reinforcing sheet results in a diminution of weight and reduction of the cost of manufacture, since the protuberances in question are obtainable in a single pressing operation. These protuberances also impart o the sheet perfect extensibility and permit it to adapt itself to all kinds of packages. In other words, a sheet of corrugated cardboard is produced with corrugations extending substantially in a line from one edge of the sheet to the other, the walls of the corrugations extending substantially perpendicular to the plane of the sheet, and each provided with a series of reinforcing protuberances projecting substantially'at right angles to the wall, and also there is produced corruoriginal plane of the sheet but instead of begated cardboard having parallel longitudi nal corrugations extending substantially in a line from one edge of the sheet to the other, the walls of the corrugations extending substantially perpendicular to the plane of the sheet, and each provided with a series of reinforcing protuberances projecting-at sub stantially right angles to the walls, the corrugations being of less elevation above the median plane of the sheet than the distance between the corrugations of the sheet.

Cardboard of this kind would in some cases leave an impression upon the articles to be packed; in this event it may obviously be provided with a plain protecting sheet. It may also happen in certain cases'where only weight is a consideration, for example where it is desired to replace a wooden packing, that one or two plane auxiliary sheets may be added (one on each side) to this improved cardboard. In this manner sheets of great lightness are obtained which are perfectly able to resist compression in the longitudinal direction of the corrugations and also compression exerted at right angles to the planes of the walls.

My improved cardboard, the corrugations of which are provided with protuberances, ofiers considerable advantages as regards cost of production. As compared with cardboard formed with continuous and smooth corrugations and pr ")vi'ied with an auxiliar reinforcing sheet, a sheet of my improved cardboard of much less thickness and conse quently of less weight per square meter will be of equal strength, owing to the provision of the protuberances on the corrugations.

It is therefore apparent that the cost price, of this novel article is considerably lower than that of ordinary con'ugated cardboards.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, what I claim is- 1. As a new article of manufacture, a sheet of corrugated cardboard having corrugations extending substantially in a line from one edge of the sheet to the opposite edge thereof, the walls of the corrugations extending substantially perpendicular to-the plane of the sheet and each being provided with a series of reinforcing protuberances projecting at substantially right angles to the walls.

2. As a new article of manufacture. corrugated cardboard having parallel longitudinal corrugations extending substantially in a line from one edge of the sheet to the other, the walls of the corrugations extending substantially perpendicular to the plane of the sheet and each being provided with a series of reinforcing protuberances projecting at substantially right angles to the walls, the corrugations being of less elevation abovethe median plane of the sheet than the distance between the corrugations of the sheet.

In witness whereof I have hereunto set my hand in presence of two witnesses.

GAMILLE THIEBAUT.

\Yitnesses:

FELIX BARON, AtGUs'rUs E. INGRAM. 

